Hammer-die



2 Sheets Sheet 1. J. W'ITI-IINGTON. v HAMMER DIE. No. 292,608. Patented Jan. 29, 1884 "UNITED STATES v PATENT @rricn.

JAMES XVITHINGT'ON, OF CHAMBERSBURG, 'ASSIGNOR TO THE TRENTON IRON COMPANY, OF TRENTON, NEYV JERSEY.

HAMMER-DIE.

SPECIFICATION forming partof LetteIsZPatent No. 2s2,ecs, dattd January 29, 1884. Applieaiiouiiled July 13,1883. (No mulch) .die, and by a key driven into the crevice of the joint; The objection to this connection has, however, been that the die has continually, owing to the unequal expansion and contraction of both the head and die, shaken loose, so that frequent stoppage for tightening up has been required. I

The fundamental idea of my invention is in contradistinetion to attaching the strikingdie to the piston-rod or its head and holding I it in place by a dovetailed joint between the head on the end of the rod and the die, and, by a key driven into the crevice of the joint, to attach the striking-die to the rod or its head by bands encircling lugs or projections from the die portion and from the rod portion, each lug or projection on each portion corre sponding with a lug or projection on the other portion, and the bands encircling corresponding lugs and clamping the two portionsto gether.

In the accompanying drawings, the several figures of which represent preferred forms of 1 construction alike embodying my invention,' Figure 1 is a vertical central sectional eleva-' tion of a construction in which the piston-rod is provided with a head made as a separate member, but rigidly connected to it. Fig. 2 is a side elevation, and Fig. 3a top plan view with the piston-rodin section, of the construction represented in Fig. 1. Fig. 4 is a vertical central sectional elevationof a' construction in which the piston-rod is provided with" a head made integral with it, and Fig. 5 a

similar view of a construetioninj which the piston-rod is devoid of any enlarged head portion, and in which the lugs are radial projections formed out of the metal of said rod and directly upon it.

Similar letters of reference indicate corre sponding parts.

Referring now to the first three figures of the drawings, which illustrate the construction, which, although not the simplest neehanically, yet is that in which I find it most economical in practice to carry out my'invention, A is the pistoinrod or handle of a steam or other hammer, and B a cap or head secured to the lower cxtremityof the piston-rod .by means of a tapering sleeve or split ring, 0,

and a cireumscribing-band, J, substantially T as represented in the drawings. These parts are secured together in the following manner: The wrought-iron band J is first shrunk upon the head B to keep it from fracturing, and the head, with the band shrunk upon it, is then heated to a dull-red heat. The tapering sleeve 0, which is split like a pistouring, is then I slipped .over the end of the piston-rod, the head 13, while red-hot, placed around said sleeve, and the die placed, as shown in the drawings, in such manner that its lugs H, hereinafter mentioned, register in vertical alignment with the lugsH, formed'on thehead B. The tapering sleeve 0 is their driven down tightly with a sledge and the head left to cool. The head B, on cooling, shrinks sufficiently, as practice has proved, to prevent the tapering sleeve 0 from slipping or shaking loose. The tendency of the blows, it is obvious, is to drive the tapering sleeve in tighter, andthe force thus exerted outwardly against the head is so great that the latter would break were it not for the band J, which efiectually prevent-s such tendency. The head and dieare preferably made of cast-iron. If,

however, the head be made of wrought-iron or soft steel, the band J would not be necessary. The set of the head upon the piston-rod is such, both head and rod being cylindrical, as

to form a eylindriform cavity at the base of I the piston-rod.

E is the strikingdie, preferably cylindriform, provided with a boss or projection, F, adapted to the cylindriform cavity, within which ,between the lower extremity of the piston'rod and the upper face of the boss, is interposed a washer or packing, G, of leather or other suitable substance.

H are a series of lugs or kindred projections radially projected from the exterior side face of the lowermost portion of the head, and H are a corresponding series of lugs similarly projected from the exterior side face of the uppermost portion of the die. The two series of lugs in the set of the parts are so disposed as to be vertically aligned in corresponding pairs. The opposing faces of the lugs are faced off in the turning up of the striking-die and of the head, so that the lugsin the contact of the die with the sleeve do not touch, but are apart. The opposing faces may, if desired, be angled or beveled,so as to slightly diverge,iu the man ner of open jaws. The ends of thelugs,which are indicated by the letter 72, are preferably semicylindric.

I are bands or links of wrought-iron, which respectively embrace respective lugs, and are conveniently shrunk around said lugs, being slipped on while hot, so that in cooling they shrink and draw the die up tightly against the head. These bands in shrinking are of course subjected to an enormous tension, which retains them fixedly in position and holds the die immovably in place until it is worn out, when it is removed by cutting the bands and replaced by a new die. The facing off orbevcling of the opposing faces of the lugs provides againstthe possibility of thei r receiving or sustaining any portion of the shock from the blows of the hammer, which otherwise would break or destroy them.

Having now described the best method of carrying my invention into practice, it is proper for me to add that while I- have in- I stanced the above as the best method now known to me for carrying out the invention, the gist of which resides in the union of the striking-die with the pistonrod,which carries it through the medium of opposing series of lugs formed, respectively, on the striking-die, and on or in practically-integral connection with the piston-rod, and of bands shrunk around thelugs in pairs, it is manifestly possible to effectuate the above-named union and relationship of parts in other ways than through the instrumentality of a cap or head applied as a separate member to the pistonrod in the manner already described. Thus,

for instance, in Fig. L I have represented the piston-rod as integral with a head or cap substantially similar to that of Fig. 1, the parts having been forged and turned up out of one piece of metal, and theseries of. lugs designated II having been formed directly upon the forged head of the piston-rod. In Fig. 5, again, I have shown the upper series of lugs as integral with a piston-rod which is unprovided with the head, the said lugs being formed out of the metal of said rod and directly upon it.

Both of the above-described methods of carrying out my invention are practical,but more expensive than the method first above described.

Having thus described my invention, I

claim- 1. In a steam or other power hammer, the combination of a striking-die provided with a series of lugs or projections,apiston-rod plunger or handle provided, substantially as here- 'inbefore set forth, with a correspondingseries of lugs or projections, and bands encircling opposing lugs, substantially as set forth.

2. In a steam or other power hammer, the combination of a piston-rod, a circi'imscribing cap or head having a series of lugs, means for securing the cap or head rigidly to the'pistonrod, a hammer-die having a corresponding s erics of lugs, and bands fitted to opposinglugs, substantially as set forth.

3. In a steam or other power hammer, the combination of a piston-1'od,a circuinseribing cap or head having a series oflugsfmeans for securing the cap or head rigidly to the pistonrod in such manner as to create a cavity at the base of said piston-rod, a hammer-die provided with a boss conformed to said cavity, and having a corresponding series of lugs,aud bands fitted to opposing lugs, substantially as set forth.

4. In a steam or other power hannner, in which both the die portion and the piston-rod portion are provided with corresponding series of lugs or projections, and are united by means of bands fitted around opposing pairs of lugs, faced-oft portions or hevels upon the opposing faces of the lugs,substantiall y as and for the purposes set forth.

5. The combination of the cap or head, the tapering sleeve, the piston-rod, and the circumscribing-band, substantially as set forth.

In testimony whereof I have hereunto signed my name this 19th day of MarclnA. D. 1883.

JAMES \VITHIXGTOX.

In presence of F. V. Micirrnt, Jon): A. STEEN. 

